Improvement in boilers or stew-pans



w. B. WATKINS. BOILER 0R STEW PAN.

No. 94,679. Patented Sept.- 7, 1869.

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whereby I accomplished WILLIAM B. WATKINS, OF JERSEY-CITY, NEWJERSEY.

Letters Patent No. 94,679, dated September 7, 1869. r

IMPROVEMENT IN BOILERS .OR STEW-PANS.

The Schedule referred to in those Letters Patent and making part of h mTo all whom it may concern.-

Be it known that I, WILLIAM B. \VATKINS, of Jersey City, State of NewJersey, have invented certain new and useful Improvements in Boilers,Sauce, or Stew-Pans, to prevent their contentsii'om boiling over; andIdo hereby declare that the following is a full de-' scription of thesame.

The object of my invention is the same as described in my previousapplication for a, patent for an improved boiler'cover, but as I thereinspecified certain vent-tubes as the means,'in connection. with others,the object of the invention, and as such tubes may be dispensed with inthe preoise manner therein used, and thereby technically, perhaps, avoida patent based upon their use, it has been deemed safest, for obtainingfull protection for the invention, to present a claim for the differentway of oustructiug the cover, to carry out the idea embodied in thefirst application.

The nature of my invention, therefore, consists in making a boiler-coverwith a ventshole (or holes, as maybe desired) in it, with anupper-covering to the hole, as a shield-plate against scalding the hand,when lifting the cover, and at the same time diverting the overflow ofwater, through the vent-hole, to the outer edge of the cover. Also, inmaking the cover so as tofit loosely within and below the upper edge ofthe boiler, and resting upon a ledge formed in the side of the boiler,or attached thereto, as may be desired.

But to describe my invention more particularly, I will refer tothenccompauying drawings, forming. a part of this specification, thesame letters of reference, wherever they occur, referring to like parts.

Figure 1 is a vertical section of the boiler or stewpau, thrhugh, thelinex z, fig. 2.

Figure? isa plan view of the same.

Figure 3 is a detached cut sectional View of the cover, through the line:2? x, fig. 2.

Letter A represents an ordinary stew-pan or boiler, baring a'ledge, B,formed in its sides, a little way below its upper edge, as a means ofsupporting the cover 0, when the hangers D are dispensed with for thatpurpose.

When the ledge is used, holes or perforations will he formed in theedges of the cover, to allow the water to flow through them, back to thebody of the boiler,

but when the hangers are used, the same object is to be accomplished bymaking the cover of a less diameter than thatof the inside of theboiler, and leave a marginal space all around it, for the water to flowback by to thebody oi the boiler.

To prevent all tendency of the cover rising, in consequence of thepressure of steam underneath, when boiling, it is proposed to useslide-latches, or make the hangers act like clamps against the insideedge of the boiler, and thus keep the cover down in its place below theedge of the boiler,'and thus cause the expanding volume of water in theboiler to escape through the vent-hole E in the cover.

This vent-hole is made in thecentral part of the cover, under thehandle, (though it may be subdivided into two or more holes, ifdesired,) and covered by ashield, F.

The object of this is to shield the hand from getting scalded, if notthus protected, when attempting to take 0d the cover; also, to deflectthe waterescaping through the vent-holes toward the edge of the cover,that it may return to the body of the boiler again.

It will be obvious that the edge of the cover must be below the upperedge of the boiler, to have the objects carried out by the invention, towit, preventing the boiling over of theoontents of a boiler, and,returning the overflowing water back to the body oi the boiler, by thecirculation established by the devices combined with the cover.

Having now described my invention, I Will proceed I to set forth What Iclaim, and desire to secure by Letters Patent of the United States- Iclaim the combination of the hangers D with a boiler-cover of less areathan the area of the boiler, for the purpose of suspending the coverloosely within the boiler, that-the overflowing water through thevent-holes E may readily find its way brick to the body of water in theboiler, andthus prevent the water running over the edges of the boiler.

W. B. WATKINS.

Witnesses Fmxnm B nnrr'r, CHARLES L. Banana.

